House Extensions | Design in the making

[Y/N] Studio prioritises nuance with its glass extension for a Victorian home

Attention to detail maintains individualism and intimacy in conservation-driven project

HAPA Architects restores grade II-listed home with sympathetic flint-faced extension

Conservation area sees new addition share materials palette of original house

Studio KAP adds metal-clad extension to Victorian villa in Glasgow

The frame-like character complements the solid presence of the existing sandstone building

Andre Kong Studio creates stepped brick loft to expand London house

The distinct brick loft is expressed as a series of three stepped volumes hosting a bedroom, study and bathroom

Delve Architects combines sawtooth roofed extension with 60s-style interiors

Groovy Roofy uses circular economy principles while meeting the clients’ wish for a playful 60s colour scheme

Artefact revamps and extends former council house in Islington

Pirouette House combines open-plan living with niches for individual activities

Selencky Parsons’ Old Apple Store addition doubles original footprint

The new structure’s form and material palette refer to those of the existing house in a contemporary way

District's canny, colourful extension wraps around ground floor flat

Colour Casing project in south east London provides flexible, light-filled spaces to the side and rear

Envelop's green-roofed volumes and reflections push the boundaries for back extensions in Hackney

Stainless steel panels and an oriel window set up a subtle intimacy between house and garden

Fieldwork's brick ribbon extension wraps up a bigger, better family home

Garden, facades and internal plan come together to make Fieldworks Architects' coherent home

Hollaway Studio’s weathered steel extension complements 18th-century Kent house

Upper Maxted uses rust-coloured steel to blend with its rural context

Coloured cement sets the tone at EBBA’s Cast House

Eco-cement and brick form the rough base for the upper level's material refinement

Larch-clad volume extends barn home into Bristol’s green belt

How Mitchell Eley Gould extended a house on green belt land to add a new kitchen and living area

Vernacular tiles front Bureau de Change’s unconventional extension

This unusually shaped rear extension to a north London semi accommodates a sunken living room

KAST Architects’ home conversion restores life to Cornish barns

How KAST made a light and airy home at Milk Moon Barn

Williams Griffiths upholds modernist ethos in Ferrings estate extension

Sympathetic addition to original home makes seamless extension

Cool for cats: how Emil Eve’s extension made a light, relaxed home

Long light and warm wood invite calm lingering

Gresford Architects extends and remodels Walthamstow house

Reorganising the layout made the terraced house better suited to modern family life, says Tom Gresford

Common Ground Workshop creates hidden oasis in end-of-terrace house

How a modest east London property was extended into Spitalfields House, merging interior and exterior spaces

AOC wraps a forest-inspired extension around a north-east London home

Gill Lambert and Geoff Shearcroft on adapting their Victorian semi to meet the needs of a family of five

Invisible Studio creates house extension for filmmaker and playwright

Piers Taylor talks about extending a Hampshire cottage to reconfigure the space and maximise the view

Sinclair Studios' addition introduces a lofty glasshouse feel

Glazed side return extension in verdant green steel brings light, life and lushness to a Clapham terrace

Rear elevation.

Grace Choi Architecture turns darkness into light with reinvented Newcastle home

Timber loggia creates connections and a delightful place to pause

James Alder takes a layered approach to Victorian extension

Brick and glass outbuildings inspire garden flat addition

Guttfield Architecture gives modernist makeover to 1960s brick box house

Practice director Fred Guttfield talks about transforming Weir Grove House in Berkshire